Fiber-optic cuvette



FIG. 1 is a perspective of a fiber-otic cuvette, shoewing my new design;

FIG, 2 is a side elevational view thereof;

FIG. 3 is an end elevational view thereof; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a fiber-optic, cuvette as described and shown. 